We set defined cost thresholds and receive alerts if the actual cost exceeds them. We use resource tagging for effective categorization and tracking of AWS resources, aligning them with specific projects for easier understanding and management. For optimal use of our elastic load balancer, we choose the right type, be it application load balancer or network load balancer, based on our application needs. We monitor and adjust elasticity and capacity to avoid unnecessary costs and implement auto-scaling to dynamically adjust the number of instances to maintain the desired application level.
To control data transfer costs, especially when moving data outside of AWS, we consider using AWS Direct Connect or AWS VPN for transfers within our organization. Setting up CloudWatch alarms helps monitor key metrics and receive notifications for specific events.